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-rw-r--r--lib/idr.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/idr.c b/lib/idr.c
index ed055b297c81..4046e29c0a99 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -29,7 +29,7 @@
#ifndef TEST // to test in user space...
#include <linux/slab.h>
#include <linux/init.h>
-#include <linux/module.h>
+#include <linux/export.h>
#endif
#include <linux/err.h>
#include <linux/string.h>
@@ -595,8 +595,10 @@ EXPORT_SYMBOL(idr_for_each);
* Returns pointer to registered object with id, which is next number to
* given id. After being looked up, *@nextidp will be updated for the next
* iteration.
+ *
+ * This function can be called under rcu_read_lock(), given that the leaf
+ * pointers lifetimes are correctly managed.
*/
-
void *idr_get_next(struct idr *idp, int *nextidp)
{
struct idr_layer *p, *pa[MAX_LEVEL];
@@ -605,11 +607,11 @@ void *idr_get_next(struct idr *idp, int *nextidp)
int n, max;
/* find first ent */
- n = idp->layers * IDR_BITS;
- max = 1 << n;
p = rcu_dereference_raw(idp->top);
if (!p)
return NULL;
+ n = (p->layer + 1) * IDR_BITS;
+ max = 1 << n;
while (id < max) {
while (n > 0 && p) {